20. Five mark example problem VII

From the top of a tower $50 \ m$ high, the angles of depression of the top and bottom of a tree are observed to be $30^{\circ}$ and $45^{\circ}$ respectively. Find the height of the tree. ($\sqrt{3} = 1.732$)

 

Answer:

 

The height of the tree $=$  

(Note: Enter the number in the first box and the unit (short form) in the second box.)